Question

The floor of a building consists of 3000 tiles which are rectangular shaped and each of its side is 25cm and 20cm in length. Find the total cost of polishing the floor, if the cost per m2 is Rs 4.
step by step​

Answer 1

Answer:

Rs. 600

Step-by-step explanation:

Area of 1 tile = Length × breadth

= 25 × 20 = 500 cm^2 = 0.05 m^2

Now as floor consists of 3000 tiles and area of 1 tile is 0.05 m^2,

Total area of the floor = 0.05 × 3000 = 150 m^2

Now, cost of polishing 1 m^2 floor = Rs. 4 (given)

Total cost of polishing 150 m^2 floor

= 150×4

= Rs. 600

Answer 2

First, we will find out the area of each tile

Area of each tile = 20 × 25

                           = 500 cm²

Now, we are given that there are 3000 tiles

So, total area = 500 × 3000

                      = 1500000 cm²

1 cm² = 10⁻⁴ m²

Therefore, 1500000 cm² = 150 m²

Now, it is given that the cost of polishing per m² is Rs. 4

So, total cost = 150 × 4

                      = 600

So, the total cost of polishing will be Rs. 600